Hannah Albaugh/Allabach b.1819 d.1913

I have Albaugh spelled Allebaugh, Allenbach, Allabach.Can anyone clear up the different spelling for me.What family spelling is most commonly used?I am looking for the parents of Hannah Allabach Haldeman.Hannah married John Haldeman of Bucks co. Pa.Thanks for any help with this. Connie